{"podcast":{"title":"Astronomy Daily: Latest Space News","slug":"astronomy-daily-space-news-updates-5658676","podcast_index_feed_id":5658676,"rss_url":"https://www.spreaker.com/show/5648921/episodes/feed","website_url":"https://www.astronomydaily.io","image_url":"https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/3ef2bb90b641d3f09a10b0a281912ff3.jpg","author":"bitesz.com","episode_count":901,"summary":"Join hosts Anna and Avery for daily Space & Astronomy news, insights, and discoveries . Give us 20 minutes and we'll give you the Universe! For more visit, our website and sign up for the free daily newsletter and check out our continually updated newsfeed. http://astronomydaily.io . Follow us on X (formerly Twitter), Facebook, YouTube and TikTok ...just search for AstroDailyPod . Enjoy! Become a supporter of this podcast: https://www.spreaker.com/podcast/astronomy-daily-latest-space-news--5648921/support .","last_synced_at":"2026-09-19T16:18:05.091830+00:00","page_url":"https://stenobird.com/podcast/astronomy-daily-space-news-updates-5658676"},"episode":{"title":"There's Something Molten Under Mars's South Pole","slug":"there-s-something-molten-under-mars-s-south-pole","published_at":"2026-09-02T08:34:25+00:00","page_url":"https://stenobird.com/podcast/astronomy-daily-space-news-updates-5658676/there-s-something-molten-under-mars-s-south-pole","show_page_url":"https://stenobird.com/podcast/astronomy-daily-space-news-updates-5658676","url":"https://www.astronomydaily.io","audio_url":"https://dts.podtrac.com/redirect.mp3/mgln.ai/track/op3.dev/e/api.spreaker.com/download/episode/74806860/there_s_something_molten_under_mars_s_south_pole.mp3","summary":"Today's episode — S05E183, Wednesday September 2, 2026: Main story: A thermal anomaly beneath Mars's south pole. Writing in Nature on August 27, a team led by Alexander Berne (Caltech PhD '26, now University of Arizona) reports that the interior of Mars's southern hemisphere is 200–400 °C hotter than the northern hemisphere and partially molten. The team used tidal tomography — measuring how much the solid body of Mars flexes under the Sun's tidal pull by tracking minute velocity changes in three orbiters (Mars Global Surveyor, Mars Odyssey and Mars Reconnaissance Orbiter) across roughly 25 years of radio tracking data. Hotter, softer rock deforms more, so the degree of flex reveals interior temperature. The result offers a deep-interior explanation for the Martian crustal dichotomy — the sharp division between the smooth low northern plains and the ancient, thickly crusted southern highlands, unexplained since the Viking era — and also accounts for the concentration of crustal magnetic anomalies in the south and the unexpectedly strong seismic-wave damping seen by InSight. The cause of the asymmetry remains open: a giant early impact, lopsided mantle convection, or a heat-trapping compositional layer. Co-authors span Brown University, NASA Goddard, the University of Arizona, Academia Sinica, the University of Rome, TU Delft, UCLA, UT Austin, CU Boulder and UC Santa Cruz. Crew-13 stands down. NASA and SpaceX announced on August 29 that an oxidizer leak had been found in the Dragon spacecraft's propulsion system during standard prelaunch processing, delaying the Crew-13 launch from its September 12 target. Teams are performing additional tests and data review and will complete any necessary rework before flight; a new target date will be announced once available. The cr…","meta_description":"Today's episode — S05E183, Wednesday September 2, 2026: Main story: A thermal anomaly beneath Mars's south pole. Writing in Nature on August 27, a team le…","key_points":[],"chapters":[],"topics":[],"duration_seconds":1422,"processing_state":"not_requested","actions":[{"name":"request_transcript","method":"POST","url":"https://stenobird.com/v1/public/podcasts/astronomy-daily-space-news-updates-5658676/episodes/there-s-something-molten-under-mars-s-south-pole/transcription-requests","description":"Idempotently request low-priority transcript generation for this episode."},{"name":"read_markdown","method":"GET","url":"https://stenobird.com/podcast/astronomy-daily-space-news-updates-5658676/there-s-something-molten-under-mars-s-south-pole.md","description":"Read the agent-friendly Markdown representation of this episode resource."}]}}